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Citation: LI Xiangb, TIAN Yu-Pinga, GU Guo-Tuana, TENG Ai-Lia, CHEN Ya-Qin. Extraction of Lignin from Carrot Root with High Boiling Solvent[J]. Chinese Journal of Applied Chemistry, ;2010, 27(4): 458-461. doi: 10.3724/SP.J.1095.2010.90246 shu

Extraction of Lignin from Carrot Root with High Boiling Solvent

a. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004;
b. Department of chemistry and chemical engineering, Henan University of Urban Construction, Pingdingshan

Received Date: 7 April 2009
Revised Date: 11 October 2009

Lignin was extracted from carrot root with high boiling solvent(HBS) 80% ethylene glycol aqueous solution as solvent.Results show that the optimum conditions were as follows:the mass ratio of raw solid materials to solvent was 1:6,temperature was 210℃,reaction time was 2 h,the maximum yield was 17.79%. The chemical structure of the carrot lignin has been characterized by FTIR, UV,and ¹H NMR.The chemical composition of HBS lignin from carrot root was determined by elemental analysis,and the content of methoxyl was tested with Vieböck's methods. The C₉ structure of lignin from carrot was estimated as C₉H_9.62O_1.99(OCH₃)_1.96.The elimination efficiency of·OH free radical by lignin from carrot was studied.The results show that carrot lignin can inhibit the activity of·OH free radical at low concentrations(50 mg/L)with a maximum inhibition efficiency of 64.9%.
- HBS solvent,
- glycol,
- carrot,
- lignin,
- antioxidant
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